ACK: [PATCH][kteam-tools] create-release-tracker: specific error if series UNRELEASED

[Seth Forshee]

On Wed, Oct 26, 2016 at 11:07:50AM -0700, Kamal Mostafa wrote:
> Since the commit
> 
>     53d78de create-release-tracker: we have the series information in the
>     changelog, use it for creating the tracking bug
> 
> the changelog series must be changed from UNRELEASED to the target
> release *before* running create-release-tracker not after.
> 
> Add an error explaining why, instead of failing cryptically.
> 
> Signed-off-by: Kamal Mostafa <kamal at canonical.com>

Beats a python stack trace, so ack.